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3 years ago

Write a 3-digit number that is divisible by both 3 and 4. Explain how you know this number is divisible by 3 and 4.

Mathematics

2 answers:

Colt1911 [192]3 years ago

6 0

Answer:

108 is a 3 digit number which is divisible by both 3 and 4

Step-by-step explanation:

We have to write a 3 digit number which is divisible by both 3 and 4

From divisibility rule we know that when the sum of of number is divisible by 3 then the number is also divisible by 3

And if the last digit of number is divisible by 4 then number is also divisible by 4

If we take number 108 then the sum of digit = 1+0+8=9, as 9 is divisible by 3 so 108 will be also divisible by 3

And in 108 last digit is 8 which is divisible by 4 so 108 will be also divisible by 4

So 108 is a 3 digit number which is divisible by both 3 and 4

Alexeev081 [22]3 years ago

5 0

Answer:

let us assume the 3 digit number be 984

To check weather the number is divisible by 3 and 4 then when should know the divisibility rule of 3 and 4.

A number is said to be divisible by 3 when the sum of each digit of the number is divisible by 3. Example 9+8+4 = 21 is divisible by 3 hence the number is divisible by 3.

A number is said to be divisible by 4 when the last two digit is divisible by 4 like 84 is divisible by 4 hence 984 is divisible by 4.

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3 years ago

A piece of a chain's length and weight are in proportion. If 320 cm of chain weighs 8 kg, then

Dafna11 [192]

Answer:

B. 80 cm of chain weighs 2 kg.

Step-by-step explanation:

In order to choose the correct answer, we need to define the comparative relation between the length and weight of the chain. We will do this by performing the simple operation of division.

It is easier to divide the larger number by the smaller and that is what we will show here (although you can do as you wish and still get the same result - it's math!):

320 ÷ 8 = 40

The result we got is 40. This means that the length of the chain is equal to the value of forty of its weights! And this will be the operation we will perform in order to determine the right answer:

A) Does 2 (kg) multiplied by 40 equal 40 (cm)? No, therefore, it is incorrect.

B) Does 2 (kg) multiplied by 40 equal 80 (cm)? Yes, this answer is correct!

Just in case, we will perform this action with the rest of the possible choices:

C) 4 kg × 40 = 160 and NOT 80 cm.

D) 2 kg × 40 = 80 and NOT 160 cm.

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3 years ago

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Katyanochek1 [597]

Answer: the answer is B. 90√2

Step-by-step explanation:

It is a 45 45 90 triangle and the hypotenuse is always the smaller side (x) root 2

Or x√2

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4 years ago

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